<!-- 4. 紧凑式多行二级栏目 - 适合内容分类较多的导航场景 -->
<div class="nav-section compact-navigation">
    <!-- 职业分类 -->
    <div class="compact-section">
        <div class="compact-main-category">
            <i class="fas fa-briefcase"></i> 职业
        </div>
        <div class="compact-subcategories">
            <a href="#" class="compact-subcategory active">程序员</a>
            <a href="#" class="compact-subcategory">设计师</a>
            <a href="#" class="compact-subcategory">产品经理</a>
            <a href="#" class="compact-subcategory">市场运营</a>
            <a href="#" class="compact-subcategory">教师</a>
            <a href="#" class="compact-subcategory">医生</a>
            <a href="#" class="compact-subcategory">律师</a>
            <a href="#" class="compact-subcategory">创业者</a>
            <a href="#" class="compact-subcategory">自由职业</a>
            <a href="#" class="compact-subcategory">更多</a>
        </div>
    </div>

    <!-- 兴趣分类 -->
    <div class="compact-section">
        <div class="compact-main-category">
            <i class="fas fa-gamepad"></i> 兴趣
        </div>
        <div class="compact-subcategories">
            <a href="#" class="compact-subcategory">游戏</a>
            <a href="#" class="compact-subcategory">动漫</a>
            <a href="#" class="compact-subcategory">追剧</a>
            <a href="#" class="compact-subcategory">追星</a>
            <a href="#" class="compact-subcategory">健身</a>
            <a href="#" class="compact-subcategory">美食</a>
            <a href="#" class="compact-subcategory">旅行</a>
            <a href="#" class="compact-subcategory">摄影</a>
            <a href="#" class="compact-subcategory">音乐</a>
            <a href="#" class="compact-subcategory">更多</a>
        </div>
    </div>

    <!-- 内容类型分类 -->
    <div class="compact-section">
        <div class="compact-main-category">
            <i class="fas fa-file-alt"></i> 内容类型
        </div>
        <div class="compact-subcategories">
            <a href="#" class="compact-subcategory">问答</a>
            <a href="#" class="compact-subcategory">文章</a>
            <a href="#" class="compact-subcategory">短视频</a>
            <a href="#" class="compact-subcategory">长视频</a>
            <a href="#" class="compact-subcategory">图集</a>
            <a href="#" class="compact-subcategory">直播</a>
            <a href="#" class="compact-subcategory">活动</a>
            <a href="#" class="compact-subcategory">投票</a>
        </div>
    </div>
</div>
